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-rw-r--r--src/archive/zip/writer_test.go425
1 files changed, 425 insertions, 0 deletions
diff --git a/src/archive/zip/writer_test.go b/src/archive/zip/writer_test.go
new file mode 100644
index 0000000..5985144
--- /dev/null
+++ b/src/archive/zip/writer_test.go
@@ -0,0 +1,425 @@
+// Copyright 2011 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package zip
+
+import (
+ "bytes"
+ "encoding/binary"
+ "fmt"
+ "io"
+ "io/fs"
+ "math/rand"
+ "os"
+ "strings"
+ "testing"
+ "time"
+)
+
+// TODO(adg): a more sophisticated test suite
+
+type WriteTest struct {
+ Name string
+ Data []byte
+ Method uint16
+ Mode fs.FileMode
+}
+
+var writeTests = []WriteTest{
+ {
+ Name: "foo",
+ Data: []byte("Rabbits, guinea pigs, gophers, marsupial rats, and quolls."),
+ Method: Store,
+ Mode: 0666,
+ },
+ {
+ Name: "bar",
+ Data: nil, // large data set in the test
+ Method: Deflate,
+ Mode: 0644,
+ },
+ {
+ Name: "setuid",
+ Data: []byte("setuid file"),
+ Method: Deflate,
+ Mode: 0755 | fs.ModeSetuid,
+ },
+ {
+ Name: "setgid",
+ Data: []byte("setgid file"),
+ Method: Deflate,
+ Mode: 0755 | fs.ModeSetgid,
+ },
+ {
+ Name: "symlink",
+ Data: []byte("../link/target"),
+ Method: Deflate,
+ Mode: 0755 | fs.ModeSymlink,
+ },
+}
+
+func TestWriter(t *testing.T) {
+ largeData := make([]byte, 1<<17)
+ if _, err := rand.Read(largeData); err != nil {
+ t.Fatal("rand.Read failed:", err)
+ }
+ writeTests[1].Data = largeData
+ defer func() {
+ writeTests[1].Data = nil
+ }()
+
+ // write a zip file
+ buf := new(bytes.Buffer)
+ w := NewWriter(buf)
+
+ for _, wt := range writeTests {
+ testCreate(t, w, &wt)
+ }
+
+ if err := w.Close(); err != nil {
+ t.Fatal(err)
+ }
+
+ // read it back
+ r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
+ if err != nil {
+ t.Fatal(err)
+ }
+ for i, wt := range writeTests {
+ testReadFile(t, r.File[i], &wt)
+ }
+}
+
+// TestWriterComment is test for EOCD comment read/write.
+func TestWriterComment(t *testing.T) {
+ var tests = []struct {
+ comment string
+ ok bool
+ }{
+ {"hi, hello", true},
+ {"hi, こんにちわ", true},
+ {strings.Repeat("a", uint16max), true},
+ {strings.Repeat("a", uint16max+1), false},
+ }
+
+ for _, test := range tests {
+ // write a zip file
+ buf := new(bytes.Buffer)
+ w := NewWriter(buf)
+ if err := w.SetComment(test.comment); err != nil {
+ if test.ok {
+ t.Fatalf("SetComment: unexpected error %v", err)
+ }
+ continue
+ } else {
+ if !test.ok {
+ t.Fatalf("SetComment: unexpected success, want error")
+ }
+ }
+
+ if err := w.Close(); test.ok == (err != nil) {
+ t.Fatal(err)
+ }
+
+ if w.closed != test.ok {
+ t.Fatalf("Writer.closed: got %v, want %v", w.closed, test.ok)
+ }
+
+ // skip read test in failure cases
+ if !test.ok {
+ continue
+ }
+
+ // read it back
+ r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
+ if err != nil {
+ t.Fatal(err)
+ }
+ if r.Comment != test.comment {
+ t.Fatalf("Reader.Comment: got %v, want %v", r.Comment, test.comment)
+ }
+ }
+}
+
+func TestWriterUTF8(t *testing.T) {
+ var utf8Tests = []struct {
+ name string
+ comment string
+ nonUTF8 bool
+ flags uint16
+ }{
+ {
+ name: "hi, hello",
+ comment: "in the world",
+ flags: 0x8,
+ },
+ {
+ name: "hi, こんにちわ",
+ comment: "in the world",
+ flags: 0x808,
+ },
+ {
+ name: "hi, こんにちわ",
+ comment: "in the world",
+ nonUTF8: true,
+ flags: 0x8,
+ },
+ {
+ name: "hi, hello",
+ comment: "in the 世界",
+ flags: 0x808,
+ },
+ {
+ name: "hi, こんにちわ",
+ comment: "in the 世界",
+ flags: 0x808,
+ },
+ {
+ name: "the replacement rune is �",
+ comment: "the replacement rune is �",
+ flags: 0x808,
+ },
+ {
+ // Name is Japanese encoded in Shift JIS.
+ name: "\x93\xfa\x96{\x8c\xea.txt",
+ comment: "in the 世界",
+ flags: 0x008, // UTF-8 must not be set
+ },
+ }
+
+ // write a zip file
+ buf := new(bytes.Buffer)
+ w := NewWriter(buf)
+
+ for _, test := range utf8Tests {
+ h := &FileHeader{
+ Name: test.name,
+ Comment: test.comment,
+ NonUTF8: test.nonUTF8,
+ Method: Deflate,
+ }
+ w, err := w.CreateHeader(h)
+ if err != nil {
+ t.Fatal(err)
+ }
+ w.Write([]byte{})
+ }
+
+ if err := w.Close(); err != nil {
+ t.Fatal(err)
+ }
+
+ // read it back
+ r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
+ if err != nil {
+ t.Fatal(err)
+ }
+ for i, test := range utf8Tests {
+ flags := r.File[i].Flags
+ if flags != test.flags {
+ t.Errorf("CreateHeader(name=%q comment=%q nonUTF8=%v): flags=%#x, want %#x", test.name, test.comment, test.nonUTF8, flags, test.flags)
+ }
+ }
+}
+
+func TestWriterTime(t *testing.T) {
+ var buf bytes.Buffer
+ h := &FileHeader{
+ Name: "test.txt",
+ Modified: time.Date(2017, 10, 31, 21, 11, 57, 0, timeZone(-7*time.Hour)),
+ }
+ w := NewWriter(&buf)
+ if _, err := w.CreateHeader(h); err != nil {
+ t.Fatalf("unexpected CreateHeader error: %v", err)
+ }
+ if err := w.Close(); err != nil {
+ t.Fatalf("unexpected Close error: %v", err)
+ }
+
+ want, err := os.ReadFile("testdata/time-go.zip")
+ if err != nil {
+ t.Fatalf("unexpected ReadFile error: %v", err)
+ }
+ if got := buf.Bytes(); !bytes.Equal(got, want) {
+ fmt.Printf("%x\n%x\n", got, want)
+ t.Error("contents of time-go.zip differ")
+ }
+}
+
+func TestWriterOffset(t *testing.T) {
+ largeData := make([]byte, 1<<17)
+ if _, err := rand.Read(largeData); err != nil {
+ t.Fatal("rand.Read failed:", err)
+ }
+ writeTests[1].Data = largeData
+ defer func() {
+ writeTests[1].Data = nil
+ }()
+
+ // write a zip file
+ buf := new(bytes.Buffer)
+ existingData := []byte{1, 2, 3, 1, 2, 3, 1, 2, 3}
+ n, _ := buf.Write(existingData)
+ w := NewWriter(buf)
+ w.SetOffset(int64(n))
+
+ for _, wt := range writeTests {
+ testCreate(t, w, &wt)
+ }
+
+ if err := w.Close(); err != nil {
+ t.Fatal(err)
+ }
+
+ // read it back
+ r, err := NewReader(bytes.NewReader(buf.Bytes()), int64(buf.Len()))
+ if err != nil {
+ t.Fatal(err)
+ }
+ for i, wt := range writeTests {
+ testReadFile(t, r.File[i], &wt)
+ }
+}
+
+func TestWriterFlush(t *testing.T) {
+ var buf bytes.Buffer
+ w := NewWriter(struct{ io.Writer }{&buf})
+ _, err := w.Create("foo")
+ if err != nil {
+ t.Fatal(err)
+ }
+ if buf.Len() > 0 {
+ t.Fatalf("Unexpected %d bytes already in buffer", buf.Len())
+ }
+ if err := w.Flush(); err != nil {
+ t.Fatal(err)
+ }
+ if buf.Len() == 0 {
+ t.Fatal("No bytes written after Flush")
+ }
+}
+
+func TestWriterDir(t *testing.T) {
+ w := NewWriter(io.Discard)
+ dw, err := w.Create("dir/")
+ if err != nil {
+ t.Fatal(err)
+ }
+ if _, err := dw.Write(nil); err != nil {
+ t.Errorf("Write(nil) to directory: got %v, want nil", err)
+ }
+ if _, err := dw.Write([]byte("hello")); err == nil {
+ t.Error(`Write("hello") to directory: got nil error, want non-nil`)
+ }
+}
+
+func TestWriterDirAttributes(t *testing.T) {
+ var buf bytes.Buffer
+ w := NewWriter(&buf)
+ if _, err := w.CreateHeader(&FileHeader{
+ Name: "dir/",
+ Method: Deflate,
+ CompressedSize64: 1234,
+ UncompressedSize64: 5678,
+ }); err != nil {
+ t.Fatal(err)
+ }
+ if err := w.Close(); err != nil {
+ t.Fatal(err)
+ }
+ b := buf.Bytes()
+
+ var sig [4]byte
+ binary.LittleEndian.PutUint32(sig[:], uint32(fileHeaderSignature))
+
+ idx := bytes.Index(b, sig[:])
+ if idx == -1 {
+ t.Fatal("file header not found")
+ }
+ b = b[idx:]
+
+ if !bytes.Equal(b[6:10], []byte{0, 0, 0, 0}) { // FileHeader.Flags: 0, FileHeader.Method: 0
+ t.Errorf("unexpected method and flags: %v", b[6:10])
+ }
+
+ if !bytes.Equal(b[14:26], make([]byte, 12)) { // FileHeader.{CRC32,CompressSize,UncompressedSize} all zero.
+ t.Errorf("unexpected crc, compress and uncompressed size to be 0 was: %v", b[14:26])
+ }
+
+ binary.LittleEndian.PutUint32(sig[:], uint32(dataDescriptorSignature))
+ if bytes.Index(b, sig[:]) != -1 {
+ t.Error("there should be no data descriptor")
+ }
+}
+
+func testCreate(t *testing.T, w *Writer, wt *WriteTest) {
+ header := &FileHeader{
+ Name: wt.Name,
+ Method: wt.Method,
+ }
+ if wt.Mode != 0 {
+ header.SetMode(wt.Mode)
+ }
+ f, err := w.CreateHeader(header)
+ if err != nil {
+ t.Fatal(err)
+ }
+ _, err = f.Write(wt.Data)
+ if err != nil {
+ t.Fatal(err)
+ }
+}
+
+func testReadFile(t *testing.T, f *File, wt *WriteTest) {
+ if f.Name != wt.Name {
+ t.Fatalf("File name: got %q, want %q", f.Name, wt.Name)
+ }
+ testFileMode(t, f, wt.Mode)
+ rc, err := f.Open()
+ if err != nil {
+ t.Fatal("opening:", err)
+ }
+ b, err := io.ReadAll(rc)
+ if err != nil {
+ t.Fatal("reading:", err)
+ }
+ err = rc.Close()
+ if err != nil {
+ t.Fatal("closing:", err)
+ }
+ if !bytes.Equal(b, wt.Data) {
+ t.Errorf("File contents %q, want %q", b, wt.Data)
+ }
+}
+
+func BenchmarkCompressedZipGarbage(b *testing.B) {
+ bigBuf := bytes.Repeat([]byte("a"), 1<<20)
+
+ runOnce := func(buf *bytes.Buffer) {
+ buf.Reset()
+ zw := NewWriter(buf)
+ for j := 0; j < 3; j++ {
+ w, _ := zw.CreateHeader(&FileHeader{
+ Name: "foo",
+ Method: Deflate,
+ })
+ w.Write(bigBuf)
+ }
+ zw.Close()
+ }
+
+ b.ReportAllocs()
+ // Run once and then reset the timer.
+ // This effectively discards the very large initial flate setup cost,
+ // as well as the initialization of bigBuf.
+ runOnce(&bytes.Buffer{})
+ b.ResetTimer()
+
+ b.RunParallel(func(pb *testing.PB) {
+ var buf bytes.Buffer
+ for pb.Next() {
+ runOnce(&buf)
+ }
+ })
+}
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